apart from the TCP typo, looks good @zhaohuabing !
thanks for also adding the TCP Validate calls which was missed earlier :)

For now, this IR and the incoming translator implementation consider EG as a non-transparent proxy between a UDP client and server, which means the server behinde the EG can't get the original source of UDP packages, instead, it sees the IP and port of the EG(Envoy).

Yeah, I'm sorry to be a blocker, but I think we need to write down a design for what UDP options we'll make available, with some explanation of the tradeoffs, before we go too much further here.

I think we need to write down a design for what UDP options we'll make available, with some explanation of the tradeoffs..

@zhaohuabing do you mind creating a .md for this and submitting a separate PR?

Okay, I'll do that.

Okay, I'll do that.

#685

thanks for adding the design doc with #685, imho this PR should be good to go